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Dear all;

Enclosed a few pics from a tachinid (?) I found yesterday in my bumble bee nest (B. hortorum). The bumble bee colony proceeded well, but since yesterday they have started to throw their larvas out of their nest. I am not sure if there is any link to the two fly specimen I found.

Can anyone identify the fly? Place: Lower Austria; 300m; size: ~ 9mm.
Do I have to expect any harm to the Bombus colony?

I have the two specimen, if necessary I can send them for ID to any place..

Thanks and best regards;

Norbert.